The last update yesterday, fixed this issue for me, and yes, I had tried replacing them. It was a legit bug for some users, that they obviously just fixed, for me anyway. Hopefully the issues have been resolved, and this will close soon.
Have the same issue. Fresh install of the game. Everything on my system is updated. Win 10 1909 Home edition, on a laptop tablet pc. With an Intel HD Graphics 520.
Seeing this issue on Bedrock Windows 10. With all the slabs, especially. They're showing as grey. Which kinda sucks, cause I was trying to do some simple pixel art on my mob farm roof. Guess I'll have to wait, or use some other unspawnable blocks, till this issue is fixed.
Yeah, I'm having this issues now too, what's weird is it just starting happening. I did a whole bunch of signs before this happened. I'm having text on sign just disappearing too. It's just odd. I'm having that old issue of anvils not letting you rename stuff occasionally as well. I'm on windows 10, playing on my realm, in bedrock.