The same issue I reported on my switch device i logged on when I noticed my inventory was
Cleared to see this issue log on to a world play for a few minutes then save and quit the world as soon as you've finished playing for a few minutes then wait another few minutes log back in and
Viola you've just learned your inventory
Only one report is needed for each bug, if it affects more than one device just mention that it the report.
Duplicate of MCPE-89748