It's definitively Fin's FAIT. When I had no mods, I had zero deserializations nor "The request timed out" and that was with three back-to-back raids. There was only one exception in the error log with a vanilla run (see below).
While I idled at the main menu, I shutdown the server, added FAIT, and brought the server up. My first raid had several network errors and tens and tens of deserializations.
I'll add a report on Fin's mod.
FWIW, here's that vanilla trace I saw in case you are curious:
Code
2022-02-02 09:13:17.297 -06:00|0.12.12.15.16584|Error|Default|NullReferenceException: Object reference not set to an instance of an object
GClass418.method_16 (GInterface95 firearmHandsController, EFT.Interactive.StationaryWeapon stationaryWeapon) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
GClass418.method_12 (Comfort.Common.Result`1[T] x) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player.smethod_0[T] (Comfort.Common.Result`1[T] result, Comfort.Common.Callback`1[T] callback) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+Class864.method_1 (Comfort.Common.Result`1[T] result) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+Process`2[TController,TResult].Complete () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+Process`2+Class838[T,U].method_0 () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+Class852.method_0 () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+FirearmController+Class755.method_0 () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+FirearmController+GClass1378.WeaponAppeared () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+FirearmController+GClass1378.OnIdleStartEvent () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+FirearmController.method_39 () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+FirearmController.IEventsConsumerOnIdleStart () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+AbstractHandsController.GInterface22.OnIdleStart () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
GClass652.smethod_12 (System.Collections.Generic.List`1[T] eventsConsumers, AnimationEventSystem.AnimationEventParameter parameter) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
GClass652.AnimatorEventHandler (System.Collections.Generic.List`1[T] eventsConsumers, System.Int32 functionNameHash, AnimationEventSystem.AnimationEventParameter parameter) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
ObjectInHandsAnimator.AnimatorEventHandler (System.Int32 functionNameHash, AnimationEventSystem.AnimationEventParameter parameter) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
GClass1094.method_2 (System.String functionName, System.Int32 functionNameHash, AnimationEventSystem.AnimationEventParameter parameter, System.Int32 stateShortNameHash) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
GClass1094.method_3 (AnimationEventSystem.AnimationEvent event, GInterface9 animator, GStruct22& stateInfo, System.Single normalizedTime) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
GClass1094.EmitEvents () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player+ItemHandsController.EmitEvents () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player.method_61 (System.Single deltaTime) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player.ComplexLateUpdate (EFT.EUpdateQueue queue, System.Single deltaTime) (at <f06201dc1e74447987a0f1a9255bb24c>:0)
EFT.Player.LateUpdate () (at <f06201dc1e74447987a0f1a9255bb24c>:0)
UnityEngine.DebugLogHandler:LogException(Exception, Object)
Class293:UnityEngine.ILogHandler.LogException(Exception, Object)
UnityEngine.Debug:CallOverridenDebugHandler(Exception, Object)
