Yes of course it will create many prblms, the first thing is in chewing, then due to chewing only from one side the whole pressure will be on one side due to which the periodontal prblms will arise. Secondly depending on the absence of the teeth there will be pathologic migration , supraeruption of the other present teeth.

Yes its not normal It may cause many problems in future one it that is MFPDS

Balanced occlusion and force distribution while  chrwing , will not be in equilibrium .so periodontal problem will arise in a long run . So advice u to replace d missing teeth

It won't create any problem as such but all the chewing forces will be concentrated on one side which will eventually lead to periodontal or gum problems, tooth attrition etc in few years to come. The cheek where teeth are not present will pout which may not look aesthetical also. Regards, Dr. Sandhya Lochav