I believe this is the same problem that encountered to me just a while ago before I post the title" How to turn off a Fill Lock icon in the Tools Bar?"
It drove nuts to try to turn off the Fill Lock. The Fill Lock is going to lock off all color to be filled in drawings. This can be turned on if you try to swatch color like linear gradient, etc. then the system can go this step to lock the color off. My last post is to ask "How to turn off a Fill Lock icon in the Tools Bar?" that I tried so hard in vain to fix this problem, but un-successfully.
You are actually in the same boat of the same issue.
Can you please share a video capture highlighting the problem. It'll help us better understand the problem and fix if there's any issue.