Linear amplifier rf feedback issues

[P_duds]

Currently running a Little kl203 linear with a genuine sirio ml145 mounted through roof on my mobile setup...whenever I stop tx the relays in the amp stay in tx mode until I turn it off or else disconnect the antenna...any tips or fixes for this issue? Grounding and swr is good and I’ve tried 2 or 3 different sets and it’s still the same.