Describe the bug
Building with normal mushroom blocks is kinda buggy, due to TARDIS relying on them for its custom blocks.

To Reproduce
Just build with usual mushroom blocks.

Screenshots

Log files
No log files related to this. This is due to the resourcepack.

/tardis version output
I'm unable to update, since all 1.18x builds won't start up on older versions.

See comment here:
#580 (comment)
The plugin is doing what it should, but the Minecraft client needs to catch up...

The new /tardismushroom command is really only to fix mushroom blocks that were placed before the TARDIS plugin was added to the server.
It is not needed for 1.17.1 if you are placing new mushroom blocks.
What you are seeing is a visual glitch only, not a plugin issue - the mushroom block states are correct, you just need to leave and join the world to see the changes, or place a non-mushroom block like in the video.

/tardis mushroom isn't a command.

Tried putting 'red' etc. Still says unknown command.

/tardismushroom, no spaces

Ah right, that's new in 1.18.1. Not sure what we can do for 1.17.1.

Again, unknown command.

I know 1.17 is a bit outdated, but I can't update since I'm waiting for certain things to update. Would be nice if 1.18x was compat. with 1.17.1, for people like me.

Oh.