FRER Faint Lines

I took a FRER this afternoon, obviously not with my first morning urine… Had a faint positive (which I posted below)between three and 10 minutes of taking the test. Once the test completely dried it disappeared. Should I consider it a faint line? Would it have stuck around if it truly was positive though pretty faint? I am 10 days past ovulation and on cycle day 27 of an average 31 day cycle. Just wondering if any of you have experienced this! I know the test is considered invalid after 10 minutes so I’m hoping that means it’s still a VFL! Thank you!