TYPO3 Core

Is this a bug in 11.5.6 or do I need to adjust something in my TypoScript to make it work again with 11.5.6?

Currently I have downgraded back to 11.5.5. There my image is rendered into the menu without any problems.

I hope someone can help.

My FILES not working any more after update to 11.5.6:

temp.header.mainNavigation = HMENU
   temp.header.mainNavigation {
      special = list
        special.value = 25
        1 = TMENU
        1 {
            wrap = <ul><li class="level-up"><span class="standard-button back">zurück</span></li>|</ul>
            NO = 1
            NO {
                wrapItemAndSub = <li class="first navitem-{field:uid}" rel="{field:uid}">|</li> |*| <li class="navitem-{field:uid}" rel="{field:uid}">|</li> |*| <li class="last navitem-{field:uid}" rel="{field:uid}">|</li>
                wrapItemAndSub.insertData = 1
                ATagBeforeWrap = 1
                linkWrap = <span class="square"><span class="square-inner clearfix">|</span></span>
                ATagParams = class="hasimage" 
                ATagParams.override.cObject = COA
                ATagParams.override.cObject {
                    if.isFalse.field = media
                    10 = TEXT
                    10.value = class="noimage" 
                }
                stdWrap {
                    cObject = COA
                    cObject {
                        # link text
                        10 = TEXT
                        10 {
                            field = subtitle // nav_title // title
                            outerWrap = <span class="menu-text second-layer">|</span>
                        }

                        # page properties image
                        20 = FILES
                        20  {
                            references {
                                table = pages
                                // we are now in context tt_content
                                uid.data = current:uid // current:uid
                                // depending whether you use CSC or FSC:
                                fieldName = media
                            }
                            maxItems = 1
                            renderObj = IMG_RESOURCE
                            renderObj {
                               file { 
                                   import.data = file:current:uid 
                                   treatIdAsReference = 1 
                                   width = 150c 
                                   height = 150c 
                               } 
                               # stdWrap.wrap = <div class="bg-image" style="background-image:url(|);"></div>
                            }
                        }
                    }
                }
            }
        }
}                                                                                        
page.13 <  temp.header.mainNavigation