Mortars need a rework. The problem you're bringing up has always existed on practically every breakthrough or escalation map.
Mortars need a harder counter, or honestly they shouldn't be able to be spammed. The glitch with dropping ammo next to you while using the mortar to make it shoot faster still exists, which is another problem.
The worst part is they feel like trash to use 90% of the time, and it's just kinda of a "hehe funni" kind of weapon. A goof nerf in places could justify a buff in other places, such as limited ammo but the stupid thing actually hits where you aim, and maybe could do some damage against tanks or had some bunker busting ability so they could deal with campers... all sorts of possibilities.
