I did some suggestions but I don’t know if we reached the same suggestions.
1.- Reimport all the asset with right mouse click on assets re-import all → problem still here
2.- Some claim that this is a problem related to SteamVR. I am developing for android so no point
3.- timjohanson claimed :
“These warnings are from anything using JobTemp allocations. The engine is also using such allocations internally, so if you are getting warnings about it without using jobs in C# it is most likely a bug in the Unity C++ code and the only thing you can really do about them is to file bug reports.”
Since I am not using jobs, so It seems like a bug
link: [Jobs][Lags] JobTempAlloc has allocations that are more than 4 frames old
4.- If I open the project with 2017.4.14f1 the warning no longer appear.
It seems like this warning is related to timeline/cinemachine stuff. It is only appear when I start a timeline with cinemachine