MLPPP DSL stopped working after upgrading

I upgraded from 6.37.5 to 6.39.1 and MLPPP stopped working for me. I have 3 DSL modems connected and a single PPPoE account. If I try and connect remotely using Winbox it will connect 1 out of 3 times but all information is blank. After downgrading back to 6.37.5 it is working well again. What am I missing? Thank you for any assistance.
Long time Mikrotik user, 1st time posting.
Thx
–John

According to RC changelog

What’s new in 6.40rc15 (2017-May-30 08:52):

!) ipsec - added support for dynamic “action=notrack” RAW rules for policies;
*) defconf - added accept ICMPv6 in forward and DHCP discover in RAW prerouting;
*) ike2 - added pfkey kernel return checks;
*) ipsec - added information in console XML for “mode-config” menu;
*) ipsec - fixed connections cleanup on policy or proposal modification;
*) ipsec - removed policy priority;
*) ppp - fixed MLPPP over multiple channels/interfaces (introduced in v6.39);