CubeCraft doesn’t offer this feature, though. Minecraft Java Edition does itself; It is a debugging feature (F3 + A) that has been implemented for a while along with some other features such as clearing chat history (F3 + D) and showing tooltips & NBT data (F3 + H - could be mistaken here).
I doubt this would be possible as a command, considering it is most likely a client-side issue/bug, just as it is on Java. I don’t think reloading specific chunks is possible on a server without having to restart or reload some part of it to fix it anyway, if it were a server-side issue, that is.
Unfortunately, I think you might have to stick with relogging for the while the issue won’t get fixed by Microsoft itself.