There is currently a bug, a very old one. Idk the root cause of it but in the bug reports it goes way back to 2024.

I have spent the freetime searching a fix and found none until I stumbled upon @Derp123's comment about adding this line of code in the mod's xml files. Found in 2915484451\Fridge\Defs\ThingDefs\Buildings_Fridge.xml

Open Buildings_Fridge.xml using notepad++

and add this line of code between </comps> and <ThingDef>

add it to all the fridges and replace the word "insert fridge label here" with the corresponding Fridge label, which will be found above. It will start with "<label>"

<building>
<groupingLabel>insert fridge label here</groupingLabel>
</building>

------------------------------Example line of code: (This is for the container)---------------------------------


<ThingDef ParentName="FFE_FridgeBase" MayRequire="LWM.DeepStorage">
<defName>FFE_FridgeContainer</defName>
<label>fridge container</label>
<terrainAffordanceNeeded>Heavy</terrainAffordanceNeeded>
<description>A powered, cargo container which can be used to freeze and store perishable food.</description>
<graphicData>
<texPath>Things/Building/Container/FridgeContainer</texPath>
<graphicClass>Graphic_Multi</graphicClass>
<drawSize>(2.5,4)</drawSize>
</graphicData>
<uiIconScale>0.9</uiIconScale>
<costList>
<Steel>300</Steel>
<ComponentIndustrial>5</ComponentIndustrial>
</costList>
<statBases>
<MaxHitPoints>300</MaxHitPoints>
<Mass>55</Mass>
<WorkToBuild>10500</WorkToBuild>
<Flammability>0.5</Flammability>
</statBases>
<blockWind>true</blockWind>
<fillPercent>1.1</fillPercent>
<soundImpactDefault>BulletImpact_Metal</soundImpactDefault>
<repairEffect>ConstructMetal</repairEffect>
<size>(2,4)</size>
<building>
<paintable>true</paintable>
<isInert>true</isInert>
<preventDeteriorationOnTop>true</preventDeteriorationOnTop>
<ignoreStoredThingsBeauty>true</ignoreStoredThingsBeauty>
</building>
<comps>
<li Class="CompProperties_Power">
<compClass>CompPowerTrader</compClass>
<basePowerConsumption>300</basePowerConsumption>
</li>
<li MayRequire="lwm.deepstorage" Class="LWM.DeepStorage.Properties">
<maxNumberStacks>5</maxNumberStacks>
<minNumberStacks>5</minNumberStacks>
<timeStoringTakes>80</timeStoringTakes>
<additionalTimeEachStack>50</additionalTimeEachStack>
<showContents>false</showContents>
<overlayType>SumOfAllItems</overlayType>
</li>
</comps>
<building>
<groupingLabel>fridge container</groupingLabel>
</building>
</ThingDef>