Which thread? This seems to happen only on Chrome, other browsers should work well.
it just happened again trying to post the above in advanced mode. it worked in quick post.
I've used chrome here for years with no problems.
Sorry, I have no idea what caused this. Clearing browser cache may help, upgrade Chrome when a new version is available, or try a different browser. I have switched between Chrome and Firefox many times, it seems common one of them doesn't work well.
Apparently a problem with chrome and safari. I dont know if there were any updates and I made no changes. Odd that it just started happening and is sporadic.