Suggestion Best Posts in Thread: Change Ceramic floor tiles

hahaha, just like the advice I got about looking at the US website for LG since the Philippine LG site does not have portable aircons...

 

Especially since you are needing repair, not just changing color, and understandably do not want to continuously adjust door height. I would at minimum remove all the tiles, giving access to removing all the loose mortar bed.

Leaving most of the bed still puts you in a raising the floor height situation, and unlike a roof which after having a couple layers of shingles can be stripped down and restarted without further issue, once you raise the floor you will have shorter doors, and raised base trim etc that is not easily lowered in the future when you do decide to redo the floor again.

I would say your options are remove and replace the tiles and mortar bed with a new floor to match existing height, probably the best overall option. or remove tiles and loose mortar only, leaving possible unseen cracks in the bed showing themselves in the same problems you have now in the weeks/months to come, and raising the floor height.