Getting this error intermittently while running migration

Tried a simple migration, got the below error.

Runner logs:

I0305 06:57:00.697588 00015 migration.go:350] mig_id=1: Running query 'SELECT DATA_LENGTH, INDEX_LENGTH, TABLE_ROWS FROM information_schema.tables WHERE table_schema=? AND table_name=?' (args: [world sbtest1]).
I0305 06:57:00.747675 00015 migration.go:357] mig_id=1: Query response was 'map[DATA_LENGTH:[22593536] INDEX_LENGTH:[2637824] TABLE_ROWS:[98712]]'
E0305 06:57:02.613776 00015 runner.go:363] mig_id=1: RestError [NextStep]: invalid character '<' looking for beginning of value.
I0305 06:57:03.552564 00015 runner.go:373] mig_id=1: Successfully failed migration.
I0305 06:57:13.576634 00015 runner.go:240] Getting staged migrations.
I0305 06:57:13.661886 00015 runner.go:247] No new staged migrations.

pt-osc logs:

[2020-03-05 06:56:58] stdout: Operation, tries, wait:
[2020-03-05 06:56:59] stdout:   analyze_table, 10, 1
[2020-03-05 06:56:59] stdout:   copy_rows, 10, 0.25
[2020-03-05 06:56:59] stdout:   create_triggers, 10, 1
[2020-03-05 06:56:59] stdout:   drop_triggers, 10, 1
[2020-03-05 06:56:59] stdout:   swap_tables, 10, 1
[2020-03-05 06:56:59] stdout:   update_foreign_keys, 10, 1
[2020-03-05 06:56:59] stdout: Starting a dry run.  `world`.`sbtest1` will not be altered.  Specify --execute instead of --dry-run to alter the table.
[2020-03-05 06:56:59] stdout: Creating new table...
[2020-03-05 06:56:59] stdout: Created new table world._sbtest1_new OK.
[2020-03-05 06:56:59] stdout: Altering new table...
[2020-03-05 06:56:59] stdout: Altered `world`.`_sbtest1_new` OK.
[2020-03-05 06:56:59] stdout: Not creating triggers because this is a dry run.
[2020-03-05 06:56:59] stdout: Not copying rows because this is a dry run.
[2020-03-05 06:56:59] stdout: Not swapping tables because this is a dry run.
[2020-03-05 06:56:59] stdout: Not dropping old table because this is a dry run.
[2020-03-05 06:56:59] stdout: Not dropping triggers because this is a dry run.
[2020-03-05 06:56:59] stdout: 2020-03-05T06:56:59 Dropping new table...
[2020-03-05 06:56:59] stdout: 2020-03-05T06:56:59 Dropped new table OK.
[2020-03-05 06:56:59] stdout: Dry run complete.  `world`.`sbtest1` was not altered.

If possible please share your skype id / slack details so that we exchange the logs instead of creating the issues here.

Start with the migration.go:350 and runner.go:363 log locations and the reported pt-osc dry-run output. Reproduce the simple MySQL migration, then trace the response beginning with '<' to determine why the intermittent error occurs. Done means the cause is verified and the failure is fixed or the report is narrowed to an actionable case.