div.rwmb-row not properly closing - resulting in nested meta box tab

Hi,

I'm using 8 tabs with 184 fields in total.
At one point the MB Columns plugin fails to properly close a rwmb-row div resulting in a nested tab-panel div which crashes my meta box tabs:

<div class="rwmb-tab-panel rwmb-tab-panel-prices" data-panel="prices">
    <div class="rwmb-row">
        <div class="rwmb-column rwmb-column-2 ">
        [...]
        </div><!-- .rwmb-column -->

=> closing div.rwmb-row is missing here

    </div>
    <div class="rwmb-tab-panel rwmb-tab-panel-areas" data-panel="areas">

=> opening div.rwmb-row is missing here

        <div class="rwmb-column rwmb-column-3 ">
            [...]
        </div><!-- .rwmb-column -->
    </div><!-- .rwmb-row -->
    <div class="rwmb-row">
        [...]
    </div><!-- .rwmb-row -->
</div>
<div class="rwmb-tab-panel rwmb-tab-panel-descriptions" data-panel="descriptions">

Meta Box 5.9.7
MB Columns 1.2.15
MB Tabs 1.1.17

I have build a test plugin with my code for you to reproduce that behaviour.
Please let me know where to send it to.

Best regards,
Hinnerk