Ec200u-cnad uart 3 getting stuck or junk

I find an issue where the EC200UCNAD uart 3 is getting stuck or giving junks while parcing NMEA output of L89H or any gps modules sending data in everysecond. And this is only getting resolved after resetting the gps module so that the data count is reduced.

Could u tell me what are the baud rates set for these two modules?