Mark for Death block if able vs menace

[Aswan jaguar]

Describe the Bug:
Mark for Death seems to be using a different method than the usual to force creature to block (also uses an optional yellow trigger not the orange one). Anyway the problem I noticed is with a creature with menace. AI cast Mark for Death targeted my Knight of Obligation to block it's Crater Hellion which had enchanted with Madcap Skills so it had menace ability.
The usual assign blockers prompt came up I assigned Knight of Obligation as a blocker it was returned to battlefield through menace ability but then another prompt without cancel came that was forcing me to block and then Knight of Obligation blocked and made/received damage to attacker.

Which card did behave improperly?
Mark for Death? menace? force to block?

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Manalink dev 778ccb5 version - duel

What exactly should be the correct behavior/interaction?
You can't be forced by Mark for Death to block with a single creature a creature with menace that only allows 2 or more blockers

Are any other cards possibly affected by this bug?
Possibly the other block if able cards vs menace ability or can't be blocked by more than one creature ability.