The problem is still there with the 1.54 hotfix. Here is another hint:
"ANY custom units or uniform packs should be temporarily disabled or you should rollback to 1.52, the reasons behind this are that whilst the mods "will run" on 1.54 they won't be working correctly given that there is a new hitpoint system that has been introduced, any custom uniform or unit/character pack will simply be broken, if using uniform its players, if using character packs for AI or zombies as an example the units will be incredibly OP and won't take damage effectively, this cannot be fixed by us (the community) and will require the mod authors to update the various addons, TRYK, RyanZombies etc are examples of these addons.
Was this on vanilla Exile or on modded whilst actually shooting at custom units or units wearing the custom clothing? Those are the only 2 circumstances that will cause the issues noted, hitpoints are setup as "dots" if you like inside the model where the game picks up bullet collisions, so its possible that you simply may have just shot them in the right place but this would not be the case 100% of the time in-action and inaccurately shooting.
HERE is a example of I believe the old system (credits to breaking point for the image source), I don't know what exactly has been changed in the newer versions but the units, clothing etc from current (pre 1.54) mods will be using this older system, if they upped hitpoint count then players wearing vanilla uniform etc will die a lot easier than those wearing the older clothing.
If you still wish to run custom units/clothing and are suffering a "out of memory" errors after a unspecified period of time, removing it from the server till it has been updated is all I can suggest, if the time it happens is guaranteed and is after an hour or 2 try cutting restart times down to before the crash" from KamikazeXeX