There are common known issues as the followings, which confirmed by ARM. Those known issues is not i.MX related but common known issue in the U-Boot, it will be fixed in community U-Boot later. ARM has posted patches already to U-Boot community. The known issues as the followings. You can get it with the following command:
64343@lava2 ~/workspace/sct_parser_arm/SCT_Parser ((6077cebd…))> python3 parser.py --config EBBR.yaml ~/sct/2021-06-11-jason-u-boot-nxp_1/Summary.ekl EBBR.seq
INFO apply_rules: Updated 199 test(s) out of 12209 after applying 124 rule(s)
INFO main: 2 dropped(s), 10 failure(s), 86 ignored(s), 106 known u-boot limitation(s), 11990 pass(s), 8 spurious(s), 7 waived(s), 0 warning(s)
It will create the result.md file. Open the result.md file, check the ## 2. Failure by group.

2. could you please send us the result.md file so that we can know what failures it is?
3. Please make sure the followings:
- use the putty instead of the default terminal
- if you meet some file create issue, make sure the first partition is marked with EFI.