Always ask for your licensed/professional HVAC company about any HVAC suggestions.
If your HVAC filter is in position near the air handler coils, it might be being sucked in or laying on the coils which might restrict the air flow. Also it might have a negative influence on the float switch shutting off the system.
A HVAC company recommended the following and we concur with this very good suggestion.
If your AC system is designed to have the filter almost against the coil, this could restricts the flow of water dow...