Game deletes worlds

Last month I'm facing a severe issue when Don't Starve Together removes worlds I play in. Till this moment it happened 3 times.

1st time I've lost a ~30 days world. I've checked folder with this world (Cluster_1) - and it was empty. After that I've created a brand new world - and game created it in the same folder.

Since I knew the game removes my worlds, I made backups after almost every time I shutted down the server. During playing in this world I switched to some old worlds I had before (IDK if it's an important detail, but still) and then decided to return to the "Cluster_1" - and it was already removed (so it was 2nd removal). As previously, I found the "Cluster_1" folder empty. I've restored my world from the backup I've made - and continued playing in this world.

After that I decided to play The Gorge event (via mod from Steam Workshop) in another old world - and after successful few tries my game crashed at server launch. After that I've noticed the game doesn't show the Gorge world. I've checked the corresponding world folder (Cluster_10), but files weren't removed. I've restarted the game, but there still was no world with Gorge event. Also noticed my previous world from Cluster_1 folder was displaying as 1-day world with no character selected (see the 1st screenshot). I've checked files for Cluster_1 - files weren't removed. Then I tried to launch the server - the game has created new session folder with new map generated (Cluster_1\Master\save\session\360A44029022F6FC); but the game was not started (it seemed like it stalled in a dead loop). So it was the 3rd time when I've lost 2 more worlds.

Few more details:

- Cluster_1 (survival) server mods (with Steam Workshop IDs): Show Me (666155465), Extra Equip Slots (375850593), Global Positions (378160973);
- Cluster_10 (The Gorge) server mods (with Steam Workshop IDs): Re-Gorge-itated (1918927570);
- client mods I use (with Steam Workshop IDs): Boss Indicators (1120124958), Combined Status (574636989), Craft Hotkeys (1920286184), Gesture Wheel (352373173), Gorge Detailed Summary (1421994079), Gorge Extender (1416911938), Keep Following (1835465557), Max Players Number (1978539160), Minimap HUD (345692228), Nightmare phase indicator (1298780476), Quick Drop - Client Version (873350047), Show Nicknames (956206484), Status Announcements (343753877), Wormwhole Icons [Fixed] (1295277999);
- usually it happens when I play The Gorge event for some time (but, probably, it's just coincedence);
- I also was playing in other worlds (mine and not);
- I was using "50 Saveslots" mod (369845558) before.

IDK the exact root cause of this bug and how exactly reproduce it. But it unprecedently annoying and demotivates me to continue playing this game and make any content for it...