@cherrymui Yes, 1.13 will become unsupported once 1.15 is released, which should happen next month. However, both 1.14 and 1.13 are supported equally until then (see #34536 for more details), so if this issue is serious to warrant a backport, our backport policy says that it must be applied to both 1.13 and 1.14 (since the bug exists in both versions). If it's okay not to apply it to 1.13, then that means it's okay not to apply it to 1.14 either.
So, the next steps here are to create a backport CL for Go 1.13, or wait for now, or decide that this issue doesn't warrant being backported and users can wait for Go 1.15 to get the fix. Let us know what approach you think is best.