Terramites cause server crash when players fighting with Celectial Scion

[00:32:19]: [string "scripts/behaviours/leash.lua"]:46: attempt to compare nil with number
LUA ERROR stack traceback:
scripts/behaviours/leash.lua:46 in (method) IsInsideLeash (Lua) <45-47>
   self =
      lastresult = FAILED
      id = 288
      homepos = function - scripts/brains/wagdrone_rollingbrain.lua:262
      nextupdatetick = 0
      returndist = 0.6
      running = true
      name = Leash
      status = READY
      parent = table: 0xf69b33d0
      inst = 156780 - wagdrone_rolling (valid:true)
      maxdist = 1
scripts/behaviours/leash.lua:15 in (method) Visit (Lua) <10-29>
   self =
      lastresult = FAILED
      id = 288
      homepos = function - scripts/brains/wagdrone_rollingbrain.lua:262
      nextupdatetick = 0
      returndist = 0.6
      running = true
      name = Leash
      status = READY
      parent = table: 0xf69b33d0
      inst = 156780 - wagdrone_rolling (valid:true)
      maxdist = 1
scripts/behaviourtree.lua:417 in (method) Visit (Lua) <415-423>
   self =
      parent = table: 0x40142140
      name = FailIfSuccess
      id = 289
      status = READY
      nextupdatetick = 0
      children = table: 0x863641a0
      lastresult = FAILED
   child = table: 0x10c74a8e0
scripts/behaviourtree.lua:606 in (method) Visit (Lua) <582-638>
   self =
      idx = 4
      lasttime = 159.83334166929
      lastresult = RUNNING
      id = 293
      nextupdatetick = 0
      name = Priority
      status = RUNNING
      parent = table: 0xf698f5e0
      children = table: 0x955a6710
      period = 0.25
   time = 159.83334166929
   do_eval = true
   oldidx = 4
   old_event = nil
   found = false
   idx = 2
   child = table: 0xf69b33d0
   should_test_anyway = nil
scripts/behaviourtree.lua:671 in (method) Visit (Lua) <661-690>
   self =
      parent = table: 0x113df0800
      name = Parallel
      id = 295
      status = RUNNING
      nextupdatetick = 0
      children = table: 0xcc120090
      lastresult = RUNNING
   done = true
   any_done = true
   idx = 2
   child = table: 0x40142140
scripts/behaviourtree.lua:606 in (method) Visit (Lua) <582-638>
   self =
      idx = 1
      lasttime = 159.83334166929
      lastresult = RUNNING
      id = 296
      nextupdatetick = 0
      name = Priority
      status = RUNNING
      children = table: 0x9d2f77a0
      period = 0.25
   time = 159.83334166929
   do_eval = true
   oldidx = 1
   old_event = nil
   found = false
   idx = 1
   child = table: 0xf698f5e0
   should_test_anyway = nil
scripts/behaviourtree.lua:22 in (method) Update (Lua) <20-27>
   self =
      root = table: 0x113df0800
      inst = 156780 - wagdrone_rolling (valid:true)
      forceupdate = false
scripts/brain.lua:227 in (method) OnUpdate (Lua) <220-229>
   self =
      behaviourqueue = table: 0x71ca3f10
      recoilspeedmult = 1
      stopped = false
      bt = Priority - RUNNING <RUNNING> (execute 1, eval in 0.25)>0.25
   >Parallel - RUNNING <RUNNING> ()>0.25
   >   ><busy state guard - SUCCESS <SUCCESS> ()>0.00
   >   >Priority - RUNNING <RUNNING> (execute 4, eval in 0.25)>0.25
   >   >   >Parallel - FAILED <FAILED> ()>0.00
   >   >   >   >Wait for Pickup - FAILED <FAILED> ()>0.00
   >   >   >   >StandStill - READY <READY> ()>0.00
   >   >   >FailIfSuccess - READY <FAILED> ()>0.00
   >   >   >   >Leash - READY <FAILED> ()>0.00
   >   >   >FailIfSuccess - FAILED <FAILED> ()>0.00
   >   >   >   >Target Cancelled - SUCCESS <SUCCESS> ()>0.00
   >   >   >StandStill - RUNNING <RUNNING> ()>0.47

      paused = false
      _onrecoil = function - scripts/brains/wagdrone_rollingbrain.lua:271
      dest = (-177.95, 0.00, 568.54)
      inst = 156780 - wagdrone_rolling (valid:true)
      recoildest = (0.00, 0.00, 0.00)
      events = table: 0x131bb2930
scripts/brain.lua:146 in (method) Update (Lua) <106-157>
   self =
      _safe_updaters = table: 0x45960100
      tickwaiters = table: 0x45960150
      hibernaters = table: 0x459601a0
      updaters = table: 0x459600b0
      instances = table: 0x45960060
   current_tick = 4795
   waiters = nil
   count = 7
   i = 1
   k = --brain--
sleep time: 0.25
Priority - RUNNING <RUN
[00:32:19]: [string "scripts/behaviours/leash.lua"]:46: attempt to compare nil with number
LUA ERROR stack traceback:
    scripts/behaviours/leash.lua:46 in (method) IsInsideLeash (Lua) <45-47>
    scripts/behaviours/leash.lua:15 in (method) Visit (Lua) <10-29>
    scripts/behaviourtree.lua:417 in (method) Visit (Lua) <415-423>
    scripts/behaviourtree.lua:606 in (method) Visit (Lua) <582-638>
    scripts/behaviourtree.lua:671 in (method) Visit (Lua) <661-690>
    scripts/behaviourtree.lua:606 in (method) Visit (Lua) <582-638>
    scripts/behaviourtree.lua:22 in (method) Update (Lua) <20-27>
    scripts/brain.lua:227 in (method) OnUpdate (Lua) <220-229>
    scripts/brain.lua:146 in (method) Update (Lua) <106-157>
    scripts/update.lua:292 in () ? (Lua) <224-298>