After confirming the prompt to strip the affected slots for the KFX and TBR, you’ll need to enter the Loadout screen and save the current Loadout in order to return the items to your inventory and remove the Invalid Loadout status.
Other Loadout errors – such as missing inventory items – can be resolved by stripping the affected ‘Mechs, saving the stripped Loadout, then re-loading the client. All missing items should be restored to your inventory.
We realize this is a pretty annoying bug, so please be assured we are working to knock it out entirely.
Regarding missing or un-redeemed ‘Mechs
There is currently an issue which sometimes prevents all items from not being fully redeemed after your initial post-patch log-in. Logging out and logging back in should fully redeem all the items you are eligible for.
Regarding texture or geometry glitches in ‘MechLab
These occasionally pop up after applying a patch, particularly with new ‘Mechs, but should be resolvable with a run of the MWO Repair Tool located in your \MechWarrior Online\Bin32 folder.
Regarding changes to the KFX and TBR Loadouts
As per the information outlined in the Patch Notes and Russ's October Road Map:
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This brings the TBR and KFX in line with the same rule being applied to all other Omni 'Mechs.