In general a bulk delete of multiple items works fine. For Items, which are created by a Service (ContentCreateStruct) this cannot be applied. Trying to delete multiple of these items (>10) following console error occurs:

TypeError: can't access property "identifier", e[u.ContentType._href] is undefined
value ezplatform-admin-ui-modules-subitems-js.js:2568
value ezplatform-admin-ui-modules-subitems-js.js:2598
value ezplatform-admin-ui-modules-subitems-js.js:2797
React 25
cKz5 ezplatform-admin-ui-location-view-js.js:5
l runtime.js:1
19 ezplatform-admin-ui-location-view-js.js:1
l runtime.js:1
t runtime.js:1
r runtime.js:1
<anonymous> ezplatform-admin-ui-location-view-js.js:1
react-dom.production.min.js:117:150

Uncaught TypeError: can't access property "identifier", e[u.ContentType._href] is undefined
value ezplatform-admin-ui-modules-subitems-js.js:2568
value ezplatform-admin-ui-modules-subitems-js.js:2598
value ezplatform-admin-ui-modules-subitems-js.js:2797
React 25
cKz5 ezplatform-admin-ui-location-view-js.js:5
l runtime.js:1
19 ezplatform-admin-ui-location-view-js.js:1
l runtime.js:1
t runtime.js:1
r runtime.js:1
<anonymous> ezplatform-admin-ui-location-view-js.js:1