Will be brief:
There's something weird happening with food in insulated pack while staying in spore cloud: sometimes it spoils and sometimes not.
I will attach two screenshots. Time space between them about 30 secs:
1) I tried to stay in spore cloud and fish in my backpack didn't spoil. But it turned to rot in my main inventory.
2) I threw backpack to the ground and picked it up; switched fish slots forward and backward and now fish spoiled synchronously in inventory and in backpack.
Btw I have no idea which of two ways is a bug and which is not .
1) Stay in spore cloud. 2) try to drop\pick backpack, switch food slots probably and return to cloud. 3) if nothing changed, back to step 2 and try again.