Cannot add OR rule after adding a Meta Field

thanks for the plugin. great job!

though i just encountered something that needs improvement or correction.

im using WP 4.0 and ACF 4.3.9. i wanted to add an OR rule for a field group.
i.e.
Post Type | value equals | deal
and
Meta Field | value equals | acf_deal_type | Ocean Cruise

-or-

Post Type | value equals | deal
and
Meta Field | value equals | acf_deal_type | River Cruise

but the problem is. after adding the first two rules (which is AND) which has “Meta Field”.

when i clicked “Add rule group”, nothing happens. i cannot add another set of rules for OR condition.

i was only able to add the OR rules, after i deleted the “Meta Field” rule in the first AND rule.

https://www.ads-software.com/plugins/advanced-custom-fields-meta-location-rule/