Yes that very well may be causing your trailer to act funky. Usually when this occurs it has to do with solenoid on the reverse lockout not getting voltage.
Sometimes this can be attributed from a corroded connector or your wiring has become damaged.
I recommend inspecting your connectors, and ensure that there is no corrosion or damage to the connector. If there is damage, you can replace the adapter with # A10-7275VP.
Additionally, if you need a new 7-way connector we do sell a variety... view full answer...
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